EP1344734B1 - Axial-position adjustment apparatus for arm shaft equipped with paper roll support arms in paper web feed unit - Google Patents
Axial-position adjustment apparatus for arm shaft equipped with paper roll support arms in paper web feed unit Download PDFInfo
- Publication number
- EP1344734B1 EP1344734B1 EP03250846A EP03250846A EP1344734B1 EP 1344734 B1 EP1344734 B1 EP 1344734B1 EP 03250846 A EP03250846 A EP 03250846A EP 03250846 A EP03250846 A EP 03250846A EP 1344734 B1 EP1344734 B1 EP 1344734B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- arm shaft
- axial
- position adjustment
- adjustment apparatus
- shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H16/00—Unwinding, paying-out webs
- B65H16/02—Supporting web roll
- B65H16/06—Supporting web roll both-ends type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H16/00—Unwinding, paying-out webs
- B65H16/10—Arrangements for effecting positive rotation of web roll
- B65H16/103—Arrangements for effecting positive rotation of web roll in which power is applied to web-roll spindle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/02—Registering, tensioning, smoothing or guiding webs transversely
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2301/00—Handling processes for sheets or webs
- B65H2301/40—Type of handling process
- B65H2301/41—Winding, unwinding
- B65H2301/415—Unwinding
- B65H2301/41505—Preparing unwinding process
- B65H2301/41508—Preparing unwinding process the web roll being in the unwinding support / unwinding location
- B65H2301/415085—Preparing unwinding process the web roll being in the unwinding support / unwinding location by adjusting / registering the lateral position of the web roll
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2403/00—Power transmission; Driving means
- B65H2403/50—Driving mechanisms
- B65H2403/52—Translation screw-thread mechanisms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2408/00—Specific machines
- B65H2408/20—Specific machines for handling web(s)
- B65H2408/24—Specific machines for handling web(s) unwinding machines
- B65H2408/241—Turret
Definitions
- the present invention relates to an axial-position adjustment apparatus for an arm shaft equipped with paper roll support arms in a paper web feed unit, adapted to adjust the axial position of the arm shaft so as to adjust the axial position of a side edge of paper web to fall within a predetermined range.
- a paper web feed unit of a rotary printing press is loaded with one to three paper rolls.
- a paper web feed unit R of a rotary newspaper-printing press includes an arm shaft 01 rotatably supported by frames F1 and F2, and pairs of paper roll support arms A1 and A2 mounted on the arm shaft 01 such that the paired paper roll support arms A1 and A2 face each other with a predetermined interval established therebetween.
- a paper roll M is supported between end portions of the paper roll support arms A1 and A2.
- Center cones C1 and C2 are provided at the corresponding end portions of the paper roll support arms A1 and A2 while facing each other on the same axis.
- One center cone C1 is provided in an axially fixed condition, whereas the other center cone C2 is provided in an axially movable condition.
- Conical portions of the center cones C1 and C2 are inserted into opposite end opening portions of a tubular paper core of the paper roll M, thereby rotatably supporting the paper roll M by the paper roll support arms A1 and A2.
- the insertion depth of a conical portion of the axially fixed center cone C into the opening portion of the tubular paper core is not constant.
- the axially protrudable center cone C2 presses the paper roll M toward the axially fixed center cone C1, thereby causing the paper roll M to move toward the center cone C1. Therefore, the position of the paper roll M in the axial direction (in the width direction) varies.
- a side edge E of the paper roll M thus supported by the paper roll support arms A1 and A2 may shift axially beyond a predetermined range.
- an arm-shaft axial-position adjustment apparatus hereinafter called as an "axial-position adjustment apparatus) K02 is used for axially moving the arm shaft 01 on which the paper roll support arms A1 and A2 are mounted.
- Electric devices for controlling a center cone actuator, a tension control brake, and the like are provided on the paper roll support arms A1 and A2. Electricity is supplied to these electric devices from slip ring units S01 and S02 provided separately from each other at the opposite sides of the arm shaft 01.
- the above-described axial-position adjustment apparatus K02 is described in, for example, " Newspaper Printing Handbook," edited by The Technical Committee of The Japan Newspaper Publishers & Editors Association, published by The Japan Newspaper Publishers & Editors Association, Apr. 10, 1997, pp. 101-103 .
- the axial-position adjustment apparatus K02 is provided at one end portion of the arm shaft 01 in the paper web feed unit R, whereas an arm-shaft-rotating apparatus (hereinafter called a "shaft-rotating apparatus") K01 for imparting an angular displacement to the paper roll support arms A1 and A2 is provided at the other end portion of the arm shaft 01.
- the axial-position adjustment apparatus K02 is also described in " Newspaper Printing," edited by The Engineering Committee of The Japan Newspaper Publishers & Editors Association, published by The Japan Newspaper Publishers & Editors Association, Oct. 31, 1980, pp. 65 and 66 .
- the axial-position adjustment apparatus K02 will be described in detail with reference to FIG. 6 .
- the arm shaft 01 has a diameter-reduced shaft end portion 011, which is integral with the remaining portion of the arm shaft 01 via a step.
- the arm shaft 01 is rotatably and axially movably supported, via a sleeve 02, in a shaft hole formed in a casing B attached to an unillustrated frame.
- a male screw 011a is formed on an end part of the shaft end portion 011 located within the casing B.
- a sleeve 03 having a radially inward protruding flange 03a is inserted into the shaft hole of the casing B.
- a slide key provided on the wall of the shaft hole prevents rotation of the sleeve 03 while allowing axial movement of the sleeve 03.
- the arm shaft 01 is rotatably inserted into the bore of the sleeve 03; the shaft end portion 011 is inserted into the bore of the radially inward protruding flange 03a; and the end face of the radially inward protruding flange 03a is in contact with the step of the arm shaft 01.
- annular male screw member 04 greater in diameter than the sleeve 03 is bolted to the radially inward protruding flange 03a.
- the thus-bolted annular male screw member 04 and the radially inward protruding flange 03a are sandwiched between the step of the arm shaft 01 and a nut 05 engaged with the male screw 011a of the shaft end portion 011 of the arm shaft 01, to thereby be axially immovable in relation to the arm shaft 01.
- a worm wheel 07 having a female screw 06 formed on its bore is provided within the casing B coaxially with the arm shaft 01 in a rotatable, axially immovable condition, while being engaged with a worm 08 to be rotated.
- the annular male screw member 04 is engaged with the female screw 06 of the worm wheel 07.
- Electric devices provided on the paper roll support arms A1 and A2 receive electricity from the slip ring units S01 and S02 provided separately from each other at the opposite sides of the arm shaft 01. Since the axial-position adjustment apparatus K02 is provided at the shaft end portion 011 of the arm shaft 01, whereas the shaft-rotating'apparatus K01 is provided at the other end portion of the arm shaft 01, the slip ring unit S01 is provided within a narrow space between the frame F1 and the paper roll support arm A1, and the slip ring unit S02 is provided within a narrow space between the frame F2 and the paper roll support arm A2.
- the present invention seeks to solve the above-mentioned problem involved in the conventional axial-position adjustment apparatuses and to provide an axial-position adjustment apparatus for an arm shaft equipped with paper roller support arms in a paper web feed unit, allowing installation thereof adjacent to a shaft-rotating apparatus at one end portion of the arm shaft so as to provide ample space for mounting a slip ring unit at the other end portion of the arm shaft.
- Preferred embodiments of the present invention provide an axial-position adjustment apparatus for an arm shaft equipped with paper roll support arms, the arm shaft being supported rotatably and axially movably on a frame of a paper web feed unit and rotated by means of a shaft-rotating apparatus located at one end portion of the arm shaft.
- the axial-position adjustment apparatus preferably comprises a moving member including a screw portion and is connected to the arm shaft in such a manner as to be rotatable and axially immovable in relation to the arm shaft.
- a guide member may also be provided which includes a screw portion engaged with the screw portion of the moving member, the guide member preferably being provided in such a manner as to be nonrotatable and axially immovable in relation to the frame.
- a drive unit may be provided for rotating the moving member, the drive unit comprising, for example, a motor.
- the moving member and the guide member are provided adjacent to the shaft-rotating apparatus.
- the drive unit for rotating the moving member may be provided on a support member connected to the arm shaft in such a manner as to be rotatable and axially immovable in relation to the arm shaft.
- the screw portion of the moving member and the screw portion of the guide member are preferably of trapezoidal threads or of a ball screw.
- the axial position adjustment apparatus for an arm shaft is adapted to adjust the axial position of a side edge of paper web.
- the motor When a side edge of paper web running and being fed from a paper roll shifts axially beyond a predetermined range, the motor receives a rotation signal that is output on the basis of a signal from a detector, and starts rotating in such a direction as to move the side edge in a direction opposite the shift. The motor continues rotating until the side edge position is restored to within the predetermined range. Subsequently, when the detector detects that the side edge position falls within the predetermined range, the output of the rotation signal stops, and thus the motor stops rotating.
- Rotation of the motor causes the screw portion of the moving member to rotate, whereby the moving member moves in the axial direction.
- Axial movement of the moving member is transmitted to the arm shaft independent of rotation of the arm shaft, thereby moving the roll paper support arms; i.e., the paper roll, and thus adjusting the position of the side edge of paper web accordingly.
- the axial-position adjustment apparatus for an arm shaft is provided adjacent to the shaft-rotating apparatus at one end portion of the arm shaft, thereby providing ample space for mounting a slip ring unit at the other end portion of the arm shaft and thus enabling installation of a slip ring unit having a large number of wiring lines. Therefore, a large number of control devices can be provided on paper roll support arms in a paper web feed unit in order to carry out precision tension control on paper web for maintaining or enhancing printing quality, thereby enabling implementation of a rotary printing press capable of performing high-quality, high-speed color printing.
- FIG. 3 shows a paper web feed unit R of a rotary printing press.
- an arm shaft 1 is supported at opposite ends by mutually facing frames F1 and F2, in a rotatable, axially movable condition.
- One to three pairs of paper roll support arms are mounted on the arm shaft 1 such that the paired paper roll support arms face each other with a predetermined interval established therebetween.
- FIG. 3 shows a pair of paper roll support arms A1 and A2.
- Center cones C1 and C2 are provided rotatably at the corresponding end portions of the paper roll support arms A1 and A2 while facing each other on the same axis.
- One center cone C1 is provided in an axially fixed condition, whereas the other center cone C2 is provided in an axially movable condition.
- Conical portions of the center cones C1 and C2 are inserted into opposite end opening portions of a tubular paper core of a paper roll M, thereby rotatably supporting the paper roll M by the paper roll support arms A1 and A2.
- an arm-shaft-rotating apparatus (hereinafter called a “shaft-rotating apparatus”) K1 for rotating the arm shaft 1 and an arm-shaft axial-position adjustment apparatus (hereinafter called an “axial-position adjustment apparatus”) K2 are provided adjacent to each other at one shaft end portion. Therefore, wide space can be provided at the other shaft end portion for installation of a slip ring unit S.
- the shaft-rotating apparatus K1 and the axial-position adjustment apparatus K2 are provided adjacent to each other at an end portion of the arm shaft 1 such that the shaft-rotating apparatus K1 is sandwiched between the axial-position adjustment apparatus K2 and the frame F1.
- the end portion of the arm shaft 1 is stepped so as to form a first shaft end portion 11 smaller in diameter than an intermediate portion of the arm shaft 1 and a second shaft end portion 12 smaller in diameter than the first shaft end portion 11 and projecting from the first shaft end portion 11.
- a worm wheel 2 is fixedly attached to the first shaft end portion 11; and a first casing 3 is provided to cover the worm wheel 2.
- the first casing 3 is supported via two angular contact ball bearings 4 on a cylindrical boss 2a of the worm wheel 2 in such a manner as to be rotatable and axially immovable in relation to the worm wheel 2.
- a guide pin 6 protruding outward from the frame F1 is inserted into the forked end portion 5a of the rotation restraint leg 5. Therefore, the first casing 3 is allowed to axially move in relation to the frame F1, but is restrained from rotating about the axis of the arm shaft 1 while moving along the axial direction of the arm shaft 1 along the length of the guide pin 6.
- the first casing 3 houses the worm wheel 2 and a worm (not shown) engaged with the worm wheel 2, thereby forming a reduction gear, to which a motor 7 for rotating the arm shaft 1 is attached.
- the axial-position adjustment apparatus K2 is configured in the following manner.
- a cup-shaped second casing 8 covers the second shaft portion 12 from the shaft end side.
- a shaft portion 10 protrudes axially outward from the center of a bottom portion of the second casing 8.
- a male screw 9 is formed at a proximal end part of the shaft portion 10.
- the second casing 8 is attached via two angular contact ball bearings 13 to the second shaft portion 12 in such a manner as to be rotatable and axially immovable in relation to the second shaft portion 12.
- the second casing 8, the male screw 9, the shaft portion 10, and the two angular contact ball bearings 13 constitute a moving member 30.
- the squarish-letter-U-shaped frame 15 has two leg portions 15a extending in parallel with the first shaft end portion 11. End parts of the two leg portions 15a are bolted to the frame F1.
- the stationary casing 14 is attached to an intermediate connection portion of the squarish-letter-U-shaped frame 15.
- the stationary casing 14 is fixedly attached to the frame F1 via the squarish-letter-U-shaped frame 15.
- a threaded hole 16 is formed in a bottom portion of the stationary casing 14.
- the male screw 9 is screwed in the threaded hole 16, and a distal end part of the shaft portion 10 protrudes axially outward through the threaded hole 16.
- a worm wheel 17 is keyed on the distal end part of the shaft portion 10.
- the stationary casing 14, the squarish-letter-U-shaped frame 15, and the threaded hole 16 constitute a guide member 40.
- a third casing 18 is attached to a cylindrical boss 17a of the worm wheel 17 via a bearing 19 while covering the worm wheel 17.
- the third casing 18 houses the worm wheel 17 and a worm (not shown) engaged with the worm wheel 17, thereby forming a reduction gear 22, to which a motor 20 for rotating the shaft portion 10 of the moving member 30 is attached.
- the motor 20 and the reduction gear 22 constitute a drive unit 50.
- a so-called gear motor such as HYPONIC DRIVE Model RNYM1 (a brake motor equipped with a reduction gear mechanism, a product of Sumitomo Heavy Industries, Ltd.) is used to implement each of the following mechanisms: the reduction gear composed of the worm wheel 2 and the worm engaged with the worm wheel 2, and the motor 7 for driving the reduction gear; and the reduction gear 22 composed of the worm wheel 17 and the worm engaged with the worm wheel 17, and the motor 20 for driving the reduction gear 22.
- HYPONIC DRIVE Model RNYM1 a brake motor equipped with a reduction gear mechanism, a product of Sumitomo Heavy Industries, Ltd.
- the reduction gear 22 of the drive unit 50 is attached to a squarish-letter-U-shaped frame 21.
- the squarish-letter-U-shaped frame 21 has two leg portions 21a extending in parallel with the second shaft end portion 12. End parts of the two leg portions 21a are bolted to the first casing 3.
- the reduction gear 22 of the drive unit 50 is attached to an intermediate connection portion of the squarish-letter-U-shaped frame 21. That is, the third casing 18 is integrally connected to the first casing 3 to thereby constitutes a support member.
- the squarish-letter-U-shaped frame 15 and the squarish-letter-U-shaped frame 21 are angularly shifted by 90 degrees from each other about the axis of the arm shaft 1 (see FIG. 2 ).
- the male screw 9 and the threaded holes 16 have trapezoidal threads as shown in FIG. 1 , but may be replaced with an unillustrated ball screw or any other screw mechanism.
- the axial-position adjustment apparatus K2 cooperates with an unillustrated detector for detecting the side edge E of running paper web W so as to restore, as needed, the position of the side edge E to within an unillustrated predetermined range.
- the shaft-rotating apparatus K1 When, in the paper web feed unit R, a consumed paper roll M is to be replaced with a new paper roll M in the course of paper web joining process, the shaft-rotating apparatus K1 is operated.
- the motor 7 ⁇ which is attached to the first casing 3 whose rotation about the arm shaft 1 is restrained by means of the rotation restraint leg 5 and the guide pin 6 ⁇ is operated, whereby a predetermined amount of rotation of the motor 7 is transmitted to the first end portion 11 via worm gears (a worm (not shown) and the worm wheel 2), and the arm shaft 1 supported by the frames F1 and F2 rotates by a predetermined angle. That is, the paper roll support arms A1 and A2 mounted on the arm shaft 1 rotate by a predetermined angle, thereby rotating by the predetermined angle the new and old paper rolls M supported by the center cones C1 and C2.
- the axial-position adjustment apparatus K2 When the position of the side edge E of paper web W is to be adjusted, the axial-position adjustment apparatus K2 is operated.
- the axial-position adjustment apparatus K2 which is located adjacent to the shaft-rotating apparatus K1 for rotating the paper roll support arms A1 and A2, operates as follows.
- the motor 20 receives a rotation signal that is output on the basis of a signal from a detector, and starts rotating in such a direction as to move the side edge E in the direction opposite the shift.
- the motor 20 continues rotating until the position of the side edge E is restored to within the predetermined range.
- the rotation signal stops being output, and thus the motor 20 stops rotating.
- the axial movement of the second casing 8 is transmitted to the second shaft portion 12; i.e., to the arm shaft 1, via the two angular contact ball bearings 13 placed between the second casing 8 and the second shaft portion 12, whereby the arm shaft 1 moves while being directed from the frame F1 to the frame F2. Therefore, the paper roll M loaded on the arm shaft 1; i.e., the side edge E of paper web W, moves away from the frame F1.
- the movement of the arm shaft 1 causes the axial movement of the first casing 3 via the two angular contact ball bearings 4.
- the operation of the axial-position adjustment apparatus K2 is independent of the shaft-rotating apparatus K1.
- the output of the rotation signal stops, and thus the motor 20 stops rotating, thereby completing the position adjustment of the side edge E of the paper web W.
- the axial-position adjustment apparatus K2 can be manually operated as needed by means of switch operation, but description thereof is omitted.
Description
- The present invention relates to an axial-position adjustment apparatus for an arm shaft equipped with paper roll support arms in a paper web feed unit, adapted to adjust the axial position of the arm shaft so as to adjust the axial position of a side edge of paper web to fall within a predetermined range.
-
- Usually, a paper web feed unit of a rotary printing press is loaded with one to three paper rolls. As shown in
FIGS. 4 and 5 , a paper web feed unit R of a rotary newspaper-printing press includes anarm shaft 01 rotatably supported by frames F1 and F2, and pairs of paper roll support arms A1 and A2 mounted on thearm shaft 01 such that the paired paper roll support arms A1 and A2 face each other with a predetermined interval established therebetween. A paper roll M is supported between end portions of the paper roll support arms A1 and A2. - Center cones C1 and C2 are provided at the corresponding end portions of the paper roll support arms A1 and A2 while facing each other on the same axis. One center cone C1 is provided in an axially fixed condition, whereas the other center cone C2 is provided in an axially movable condition. Conical portions of the center cones C1 and C2 are inserted into opposite end opening portions of a tubular paper core of the paper roll M, thereby rotatably supporting the paper roll M by the paper roll support arms A1 and A2.
- Since the diameter of an opening portion of the tubular paper core varies greatly among paper rolls M, the insertion depth of a conical portion of the axially fixed center cone C into the opening portion of the tubular paper core is not constant. The axially protrudable center cone C2 presses the paper roll M toward the axially fixed center cone C1, thereby causing the paper roll M to move toward the center cone C1. Therefore, the position of the paper roll M in the axial direction (in the width direction) varies.
- Therefore, a side edge E of the paper roll M thus supported by the paper roll support arms A1 and A2 may shift axially beyond a predetermined range. In order to adjust the axial position of the side edge E to fall within the predetermined range, an arm-shaft axial-position adjustment apparatus (hereinafter called as an "axial-position adjustment apparatus) K02 is used for axially moving the
arm shaft 01 on which the paper roll support arms A1 and A2 are mounted. - Electric devices for controlling a center cone actuator, a tension control brake, and the like are provided on the paper roll support arms A1 and A2. Electricity is supplied to these electric devices from slip ring units S01 and S02 provided separately from each other at the opposite sides of the
arm shaft 01. - The above-described axial-position adjustment apparatus K02 is described in, for example, "Newspaper Printing Handbook," edited by The Technical Committee of The Japan Newspaper Publishers & Editors Association, published by The Japan Newspaper Publishers & Editors Association, Apr. 10, 1997, pp. 101-103. As shown in
FIG. 5 , the axial-position adjustment apparatus K02 is provided at one end portion of thearm shaft 01 in the paper web feed unit R, whereas an arm-shaft-rotating apparatus (hereinafter called a "shaft-rotating apparatus") K01 for imparting an angular displacement to the paper roll support arms A1 and A2 is provided at the other end portion of thearm shaft 01. - The axial-position adjustment apparatus K02 is also described in "Newspaper Printing," edited by The Engineering Committee of The Japan Newspaper Publishers & Editors Association, published by The Japan Newspaper Publishers & Editors Association, Oct. 31, 1980, pp. 65 and 66.
- The axial-position adjustment apparatus K02 will be described in detail with reference to
FIG. 6 . Thearm shaft 01 has a diameter-reducedshaft end portion 011, which is integral with the remaining portion of thearm shaft 01 via a step. Thearm shaft 01 is rotatably and axially movably supported, via asleeve 02, in a shaft hole formed in a casing B attached to an unillustrated frame. Amale screw 011a is formed on an end part of theshaft end portion 011 located within the casing B. - A
sleeve 03 having a radially inward protrudingflange 03a is inserted into the shaft hole of the casing B. A slide key provided on the wall of the shaft hole prevents rotation of thesleeve 03 while allowing axial movement of thesleeve 03. - The
arm shaft 01 is rotatably inserted into the bore of thesleeve 03; theshaft end portion 011 is inserted into the bore of the radially inward protrudingflange 03a; and the end face of the radially inward protrudingflange 03a is in contact with the step of thearm shaft 01. - An annular
male screw member 04 greater in diameter than thesleeve 03 is bolted to the radially inward protrudingflange 03a. The thus-bolted annularmale screw member 04 and the radially inward protrudingflange 03a are sandwiched between the step of thearm shaft 01 and anut 05 engaged with themale screw 011a of theshaft end portion 011 of thearm shaft 01, to thereby be axially immovable in relation to thearm shaft 01. - A worm wheel 07 having a
female screw 06 formed on its bore is provided within the casing B coaxially with thearm shaft 01 in a rotatable, axially immovable condition, while being engaged with aworm 08 to be rotated. - The annular
male screw member 04 is engaged with thefemale screw 06 of the worm wheel 07. - When the
worm 08 engaged with the worm wheel 07 is rotated by a motor 09 (FIG. 4 ), thefemale screw 06 of the worm wheel 07 rotates. Theannular male member 04, which, together with thesleeve 03, is nonrotatable, converts rotation of thefemale screw 06 to an axial movement of theannular male member 04, thereby axially moving thearm shaft 01 via thesleeve 03. - Electric devices provided on the paper roll support arms A1 and A2 receive electricity from the slip ring units S01 and S02 provided separately from each other at the opposite sides of the
arm shaft 01. Since the axial-position adjustment apparatus K02 is provided at theshaft end portion 011 of thearm shaft 01, whereas the shaft-rotating'apparatus K01 is provided at the other end portion of thearm shaft 01, the slip ring unit S01 is provided within a narrow space between the frame F1 and the paper roll support arm A1, and the slip ring unit S02 is provided within a narrow space between the frame F2 and the paper roll support arm A2. - Previously proposed axial-position adjustment apparatuses such as those described above have been found to suffer from the following problems.
- Since the axial-position adjustment apparatus is provided at an end portion of an arm shaft opposite the end portion at which a shaft-rotating apparatus is provided, space for mounting a slip ring unit is limited. Meanwhile, in recent years, demand for high-speed color printing of newspapers has been increasing in newspaper publishing companies. Thus, rotary newspaper-printing presses have been required to provide precision tension control on paper web in order to maintain or enhance printing quality in high-speed printing.
- In order to meet the demand, a large number of control devices required for precision tension control on paper web are provided on paper roll support arms in a paper web feed unit, thereby increasing the number of wiring lines for electricity supply. Therefore, a slip ring unit for a large number of wiring lines must be mounted. However, such a slip ring unit requires wide space along the axial direction of the arm shaft, but the conventional axial-position adjustment apparatuses fail to provide such wide space for mounting the slip ring unit.
- The present invention seeks to solve the above-mentioned problem involved in the conventional axial-position adjustment apparatuses and to provide an axial-position adjustment apparatus for an arm shaft equipped with paper roller support arms in a paper web feed unit, allowing installation thereof adjacent to a shaft-rotating apparatus at one end portion of the arm shaft so as to provide ample space for mounting a slip ring unit at the other end portion of the arm shaft.
- Preferred embodiments of the present invention provide an axial-position adjustment apparatus for an arm shaft equipped with paper roll support arms, the arm shaft being supported rotatably and axially movably on a frame of a paper web feed unit and rotated by means of a shaft-rotating apparatus located at one end portion of the arm shaft.
- The axial-position adjustment apparatus preferably comprises a moving member including a screw portion and is connected to the arm shaft in such a manner as to be rotatable and axially immovable in relation to the arm shaft. A guide member may also be provided which includes a screw portion engaged with the screw portion of the moving member, the guide member preferably being provided in such a manner as to be nonrotatable and axially immovable in relation to the frame. Furthermore, a drive unit may be provided for rotating the moving member, the drive unit comprising, for example, a motor.
- Preferably, the moving member and the guide member are provided adjacent to the shaft-rotating apparatus. The drive unit for rotating the moving member may be provided on a support member connected to the arm shaft in such a manner as to be rotatable and axially immovable in relation to the arm shaft. The screw portion of the moving member and the screw portion of the guide member are preferably of trapezoidal threads or of a ball screw.
- In a rotary printing press, the axial position adjustment apparatus for an arm shaft is adapted to adjust the axial position of a side edge of paper web.
- When a side edge of paper web running and being fed from a paper roll shifts axially beyond a predetermined range, the motor receives a rotation signal that is output on the basis of a signal from a detector, and starts rotating in such a direction as to move the side edge in a direction opposite the shift. The motor continues rotating until the side edge position is restored to within the predetermined range. Subsequently, when the detector detects that the side edge position falls within the predetermined range, the output of the rotation signal stops, and thus the motor stops rotating.
- Rotation of the motor causes the screw portion of the moving member to rotate, whereby the moving member moves in the axial direction. Axial movement of the moving member is transmitted to the arm shaft independent of rotation of the arm shaft, thereby moving the roll paper support arms; i.e., the paper roll, and thus adjusting the position of the side edge of paper web accordingly.
- According to preferred embodiments of the present invention, the axial-position adjustment apparatus for an arm shaft is provided adjacent to the shaft-rotating apparatus at one end portion of the arm shaft, thereby providing ample space for mounting a slip ring unit at the other end portion of the arm shaft and thus enabling installation of a slip ring unit having a large number of wiring lines. Therefore, a large number of control devices can be provided on paper roll support arms in a paper web feed unit in order to carry out precision tension control on paper web for maintaining or enhancing printing quality, thereby enabling implementation of a rotary printing press capable of performing high-quality, high-speed color printing.
- For a better understanding of the present invention, and to show the same may be carried into effect, reference will now be made, by way of example to the accompanying drawings in which:
-
FIG. 1 is a partially sectioned view of an axial-position adjustment apparatus according to an embodiment of the present invention provided at one end portion of an arm shaft; -
FIG. 2 is a perspective view of the axial-position adjustment apparatus ofFIG. 1 ; -
FIG. 3 is a schematic view showing a paper web feed unit having the axial-position adjustment apparatus ofFIG. 1 ; -
FIG. 4 is a schematic side view of a previously proposed web feed unit; -
FIG. 5 is a schematic front view of the previously-proposed paper web feed unit ofFIG. 4 ; and -
FIG. 6 is a sectional view of a previously proposed position adjustment apparatus. - An axial-position adjustment apparatus according to an embodiment of the present invention for an arm shaft equipped with paper roll support arms in a paper web feed unit will next be described in detail with reference to the drawings.
- First, a paper web feed unit R of a rotary printing press will be described. As shown in
FIG. 3 , anarm shaft 1 is supported at opposite ends by mutually facing frames F1 and F2, in a rotatable, axially movable condition. One to three pairs of paper roll support arms are mounted on thearm shaft 1 such that the paired paper roll support arms face each other with a predetermined interval established therebetween.FIG. 3 shows a pair of paper roll support arms A1 and A2. - Center cones C1 and C2 are provided rotatably at the corresponding end portions of the paper roll support arms A1 and A2 while facing each other on the same axis.
- One center cone C1 is provided in an axially fixed condition, whereas the other center cone C2 is provided in an axially movable condition.
- Conical portions of the center cones C1 and C2 are inserted into opposite end opening portions of a tubular paper core of a paper roll M, thereby rotatably supporting the paper roll M by the paper roll support arms A1 and A2.
- Opposite end portions of the
arm shaft 1 protrude axially outward from the corresponding frames F1 and F2. An arm-shaft-rotating apparatus (hereinafter called a "shaft-rotating apparatus") K1 for rotating thearm shaft 1 and an arm-shaft axial-position adjustment apparatus (hereinafter called an "axial-position adjustment apparatus") K2 are provided adjacent to each other at one shaft end portion. Therefore, wide space can be provided at the other shaft end portion for installation of a slip ring unit S. - As shown in
FIG. 1 , the shaft-rotating apparatus K1 and the axial-position adjustment apparatus K2 are provided adjacent to each other at an end portion of thearm shaft 1 such that the shaft-rotating apparatus K1 is sandwiched between the axial-position adjustment apparatus K2 and the frame F1. The end portion of thearm shaft 1 is stepped so as to form a firstshaft end portion 11 smaller in diameter than an intermediate portion of thearm shaft 1 and a secondshaft end portion 12 smaller in diameter than the firstshaft end portion 11 and projecting from the firstshaft end portion 11. - In the shaft-rotating apparatus K1, a
worm wheel 2 is fixedly attached to the firstshaft end portion 11; and afirst casing 3 is provided to cover theworm wheel 2. Specifically, thefirst casing 3 is supported via two angularcontact ball bearings 4 on acylindrical boss 2a of theworm wheel 2 in such a manner as to be rotatable and axially immovable in relation to theworm wheel 2. - A
rotation restraint leg 5 having a forkedend portion 5a protrudes radially from thefirst casing 3. Aguide pin 6 protruding outward from the frame F1 is inserted into the forkedend portion 5a of therotation restraint leg 5. Therefore, thefirst casing 3 is allowed to axially move in relation to the frame F1, but is restrained from rotating about the axis of thearm shaft 1 while moving along the axial direction of thearm shaft 1 along the length of theguide pin 6. - The
first casing 3 houses theworm wheel 2 and a worm (not shown) engaged with theworm wheel 2, thereby forming a reduction gear, to which amotor 7 for rotating thearm shaft 1 is attached. - The axial-position adjustment apparatus K2 is configured in the following manner. A cup-shaped
second casing 8 covers thesecond shaft portion 12 from the shaft end side. Ashaft portion 10 protrudes axially outward from the center of a bottom portion of thesecond casing 8. Amale screw 9 is formed at a proximal end part of theshaft portion 10. Thesecond casing 8 is attached via two angularcontact ball bearings 13 to thesecond shaft portion 12 in such a manner as to be rotatable and axially immovable in relation to thesecond shaft portion 12. Thesecond casing 8, themale screw 9, theshaft portion 10, and the two angularcontact ball bearings 13 constitute a movingmember 30. - A cup-shaped
stationary casing 14, which covers thesecond casing 8 from the shaft end side, is attached to a squarish-letter-U-shaped frame 15. The squarish-letter-U-shaped frame 15 has twoleg portions 15a extending in parallel with the firstshaft end portion 11. End parts of the twoleg portions 15a are bolted to the frame F1. Thestationary casing 14 is attached to an intermediate connection portion of the squarish-letter-U-shaped frame 15. Thus, thestationary casing 14 is fixedly attached to the frame F1 via the squarish-letter-U-shaped frame 15. - A threaded
hole 16 is formed in a bottom portion of thestationary casing 14. Themale screw 9 is screwed in the threadedhole 16, and a distal end part of theshaft portion 10 protrudes axially outward through the threadedhole 16. Aworm wheel 17 is keyed on the distal end part of theshaft portion 10. - The
stationary casing 14, the squarish-letter-U-shaped frame 15, and the threadedhole 16 constitute aguide member 40. - A
third casing 18 is attached to acylindrical boss 17a of theworm wheel 17 via abearing 19 while covering theworm wheel 17. Thethird casing 18 houses theworm wheel 17 and a worm (not shown) engaged with theworm wheel 17, thereby forming areduction gear 22, to which amotor 20 for rotating theshaft portion 10 of the movingmember 30 is attached. Themotor 20 and thereduction gear 22 constitute adrive unit 50. - A so-called gear motor such as HYPONIC DRIVE Model RNYM1 (a brake motor equipped with a reduction gear mechanism, a product of Sumitomo Heavy Industries, Ltd.) is used to implement each of the following mechanisms: the reduction gear composed of the
worm wheel 2 and the worm engaged with theworm wheel 2, and themotor 7 for driving the reduction gear; and thereduction gear 22 composed of theworm wheel 17 and the worm engaged with theworm wheel 17, and themotor 20 for driving thereduction gear 22. - The
reduction gear 22 of thedrive unit 50 is attached to a squarish-letter-U-shaped frame 21. The squarish-letter-U-shaped frame 21 has twoleg portions 21a extending in parallel with the secondshaft end portion 12. End parts of the twoleg portions 21a are bolted to thefirst casing 3. Thereduction gear 22 of thedrive unit 50 is attached to an intermediate connection portion of the squarish-letter-U-shaped frame 21. That is, thethird casing 18 is integrally connected to thefirst casing 3 to thereby constitutes a support member. - In order to avoid mutual interference, the squarish-letter-
U-shaped frame 15 and the squarish-letter-U-shaped frame 21 are angularly shifted by 90 degrees from each other about the axis of the arm shaft 1 (seeFIG. 2 ). - Notably, in the present embodiment, the
male screw 9 and the threadedholes 16 have trapezoidal threads as shown inFIG. 1 , but may be replaced with an unillustrated ball screw or any other screw mechanism. - In the course of operation of a rotary printing press, the axial-position adjustment apparatus K2 cooperates with an unillustrated detector for detecting the side edge E of running paper web W so as to restore, as needed, the position of the side edge E to within an unillustrated predetermined range.
- Next, the operation of the above-described axial-position adjustment apparatus K2 will be described.
- When, in the paper web feed unit R, a consumed paper roll M is to be replaced with a new paper roll M in the course of paper web joining process, the shaft-rotating apparatus K1 is operated. The
motor 7―which is attached to thefirst casing 3 whose rotation about thearm shaft 1 is restrained by means of therotation restraint leg 5 and theguide pin 6―is operated, whereby a predetermined amount of rotation of themotor 7 is transmitted to thefirst end portion 11 via worm gears (a worm (not shown) and the worm wheel 2), and thearm shaft 1 supported by the frames F1 and F2 rotates by a predetermined angle. That is, the paper roll support arms A1 and A2 mounted on thearm shaft 1 rotate by a predetermined angle, thereby rotating by the predetermined angle the new and old paper rolls M supported by the center cones C1 and C2. - Since the second
shaft end portion 12 is supported by thesecond casing 8 via the two angularcontact ball bearings 13, rotation of thearm shaft 1 effected by the shaft-rotating apparatus K1 is not transmitted to thesecond casing 8. Thus, the operation of the shaft-rotating apparatus K1 is independent of the axial-position adjustment apparatus k2. - When the position of the side edge E of paper web W is to be adjusted, the axial-position adjustment apparatus K2 is operated.
- The axial-position adjustment apparatus K2, which is located adjacent to the shaft-rotating apparatus K1 for rotating the paper roll support arms A1 and A2, operates as follows. When the side edge E of paper web W, running and being fed from the paper roll M as shown in
FIG. 3 , shifts axially beyond a predetermined range, themotor 20 receives a rotation signal that is output on the basis of a signal from a detector, and starts rotating in such a direction as to move the side edge E in the direction opposite the shift. Themotor 20 continues rotating until the position of the side edge E is restored to within the predetermined range. - Subsequently, when the detector detects that the position of the side edge E falls within the predetermined range, the rotation signal stops being output, and thus the
motor 20 stops rotating. - Specifically, as shown in
FIG. 1 , rotation of themotor 20 is transmitted to theshaft portion 10 via thereduction gear 22, thereby rotating themale screw 9. Since the threadedhole 16 in which themale screw 9 is screwed is formed in thestationary casing 14 fixedly attached to the frame F1, themale screw 9; i.e., thesecond casing 8, moves axially in relation to thestationary casing 14. - When the
male screw 9 and the threadedholes 16 are of right-hand threads, clockwise rotation of theshaft portion 10; i.e., themale screw 9, as viewed from the end face ofshaft portion 10 causes themale screw 9 to be screwed into the stationary threadedhole 16 while rotating; as a result, thesecond casing 8 moves toward the frame F1. - The axial movement of the
second casing 8 is transmitted to thesecond shaft portion 12; i.e., to thearm shaft 1, via the two angularcontact ball bearings 13 placed between thesecond casing 8 and thesecond shaft portion 12, whereby thearm shaft 1 moves while being directed from the frame F1 to the frame F2. Therefore, the paper roll M loaded on thearm shaft 1; i.e., the side edge E of paper web W, moves away from the frame F1. - When the
motor 20 rotates in the reverse direction to thereby cause counterclockwise rotation of theshaft portion 10; i.e., themale screw 9, the paper roll M; i.e., the side edge E of paper web W, moves toward the frame F1. - The movement of the
arm shaft 1 causes the axial movement of thefirst casing 3 via the two angularcontact ball bearings 4. However, since the axial movement of therotation restraint leg 5 in relation to theguide pin 6; i.e., the axial movement of thefirst casing 3 in relation to the frames F1 and F2, is not restrained, the operation of the axial-position adjustment apparatus K2 is independent of the shaft-rotating apparatus K1. - Also, since the
drive unit 50―composed of themotor 20 and thereduction gear 22 including theworm wheel 17 mounted on theshaft portion 10 and the worm engaged with theworm wheel 17―is attached to thefirst casing 3 via the squarish-letter-U-shaped frame 21, thedrive unit 50 moves in unison with thefirst casing 3. - When the detector detects that the position of the side edge E of paper web W falls within a predetermined range, the output of the rotation signal stops, and thus the
motor 20 stops rotating, thereby completing the position adjustment of the side edge E of the paper web W. - Needless to say, the axial-position adjustment apparatus K2 can be manually operated as needed by means of switch operation, but description thereof is omitted.
Claims (13)
- An axial-position adjustment apparatus for an arm shaft O1 comprising paper roll support arms A1,A2, said arm shaft being rotatably supported and axially movable on a frame F1, F2 in a paper web feed unit and being rotated by means of a shaft-rotating apparatus located at one end portion of said arm shaft O1, said axial-position adjustment apparatus comprising:a moving member 30 comprising a screw portion 9, the moving member being connected to said arm shaft so as to be rotatable and axially immovable in relation to said arm shaft O1;a guide member 40 including a screw portion engaged with the screw portion 9 of said moving member 30, said guide member being provided so as to be nonrotatable and axially immovable in relation to the frame F1, F2; anda drive unit 50 for rotating said moving member 30.
- An axial-position adjustment apparatus for an arm shaft O1 according to claim 1, wherein said moving member 30 and said guide member 40 are provided adjacent to said shaft-rotating apparatus.
- An axial-position adjustment apparatus for an arm shaft O1 according to claim 2, wherein said drive unit comprises a motor 7.
- An axial-position adjustment apparatus for an arm shaft O1 according to claim 2, wherein the screw portion 9 of said moving member 30 and the screw portion 16 of said guide member 40 are of trapezoidal threads.
- An axial-position adjustment apparatus for an arm shaft O1 according to claim 2, wherein the screw portion 9 of said moving member 30 and the screw portion 16 of said guide member 40 are of a ball screw.
- An axial-position adjustment apparatus for an arm shaft O1 according to claim 1, wherein said drive unit 50 is provided on a support member connected to said arm shaft O1 in such a manner as to be rotatable and axially immovable in relation to said arm shaft O1.
- An axial-position adjustment apparatus for an arm shaft according to claim 6, wherein said drive unit 50 comprises a motor 20.
- An axial-position adjustment apparatus for an arm shaft O1 according to claim 6, wherein the screw portion 9 of said moving member 30 and the screw portion 16 of said guide member 40 are of trapezoidal threads.
- An axial-position adjustment apparatus for an arm shaft according to claim 6, wherein the screw portion 9 of said moving member 30 and the screw portion 16 of said guide member 40 are of a ball screw.
- An axial-position adjustment apparatus for an arm shaft O1 according to claim 2, wherein said drive unit 50 is provided on a support member connected to said arm shaft O1 in such a manner as to be rotatable and axially immovable in relation to said arm shaft O1.
- An axial-position adjustment apparatus for an arm shaft O1 according to claim 10, wherein said drive unit comprises a motor 20.
- An axial-position adjustment apparatus for an arm shaft according to claim 10, wherein the screw portion 9 of said moving member 30 and the screw portion 16 of said guide member 40 are of trapezoidal threads.
- An axial-position adjustment apparatus for an arm shaft according to claim 10, wherein the screw portion 9 of said moving member 30 and the screw portion 16 of said guide member 40 are of a ball screw.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002071851A JP3703023B2 (en) | 2002-03-15 | 2002-03-15 | Axial position adjusting device for arm shaft of winding paper mounting arm in paper feeding unit |
JP2002071851 | 2002-03-15 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1344734A2 EP1344734A2 (en) | 2003-09-17 |
EP1344734A3 EP1344734A3 (en) | 2005-04-13 |
EP1344734B1 true EP1344734B1 (en) | 2008-07-09 |
Family
ID=27764553
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03250846A Expired - Fee Related EP1344734B1 (en) | 2002-03-15 | 2003-02-11 | Axial-position adjustment apparatus for arm shaft equipped with paper roll support arms in paper web feed unit |
Country Status (4)
Country | Link |
---|---|
US (1) | US6739546B2 (en) |
EP (1) | EP1344734B1 (en) |
JP (1) | JP3703023B2 (en) |
DE (1) | DE60321982D1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006038493A1 (en) * | 2006-08-16 | 2008-02-21 | Sms Demag Ag | Doppelspreizkopf-Karusselhaspel |
CN116815151A (en) * | 2023-03-02 | 2023-09-29 | 安徽越好电子装备有限公司 | Roll shaft adjusting device and vacuum winding coating equipment |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB468211A (en) * | 1934-12-29 | 1937-06-28 | Hoe & Co R | A new or improved web feeding mechanism |
US2066377A (en) * | 1935-10-17 | 1937-01-05 | Wean Engineering Co Inc | Coil holder |
US2561146A (en) * | 1947-06-10 | 1951-07-17 | Samuel M Langston Co | Mill roll stand |
US4102511A (en) * | 1975-12-11 | 1978-07-25 | Worldwide Converting Machinery, Inc. | Turret for winders and unwinders |
JPS57184045A (en) * | 1981-05-09 | 1982-11-12 | Mitsubishi Heavy Ind Ltd | Mill roll stand |
JP3041619B1 (en) * | 1999-04-23 | 2000-05-15 | 株式会社東京機械製作所 | Web loading device in the paper feed unit |
-
2002
- 2002-03-15 JP JP2002071851A patent/JP3703023B2/en not_active Expired - Fee Related
-
2003
- 2003-01-30 US US10/353,942 patent/US6739546B2/en not_active Expired - Fee Related
- 2003-02-11 EP EP03250846A patent/EP1344734B1/en not_active Expired - Fee Related
- 2003-02-11 DE DE60321982T patent/DE60321982D1/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP1344734A3 (en) | 2005-04-13 |
US20030173453A1 (en) | 2003-09-18 |
JP3703023B2 (en) | 2005-10-05 |
JP2003267599A (en) | 2003-09-25 |
EP1344734A2 (en) | 2003-09-17 |
US6739546B2 (en) | 2004-05-25 |
DE60321982D1 (en) | 2008-08-21 |
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